PyQt - 多次打开同一页面[重复]

Question

我想从我的 Index.py 页面中多次打开 Form.py 页面。 当我第二次尝试打开表单时，第一个表单页面关闭。

有我的 Index.py 代码：

from PyQt5 import QtCore, QtGui, QtWidgets
from Form import Ui_FormWindow

class Ui_MainWindow(object):

    #The function to open the Form.py
    def open(self):
        self.window = QtWidgets.QMainWindow()
        self.ui = Ui_FormWindow()
        self.ui.setupUi(self.window)
        self.window.show()


    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(230, 180, 93, 28))
        self.pushButton.setObjectName("pushButton")

        self.pushButton.clicked.connect(self.open)

        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 26))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton.setText(_translate("MainWindow", "PushButton"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

这是我要多次打开的页面，Form.py：

from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_FormWindow(object):
    def setupUi(self, FormWindow):
        FormWindow.setObjectName("FormWindow")
        FormWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(FormWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit.setGeometry(QtCore.QRect(250, 190, 113, 22))
        self.lineEdit.setObjectName("lineEdit")
        FormWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(FormWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 26))
        self.menubar.setObjectName("menubar")
        FormWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(FormWindow)
        self.statusbar.setObjectName("statusbar")
        FormWindow.setStatusBar(self.statusbar)

        self.retranslateUi(FormWindow)
        QtCore.QMetaObject.connectSlotsByName(FormWindow)

    def retranslateUi(self, FormWindow):
        _translate = QtCore.QCoreApplication.translate
        FormWindow.setWindowTitle(_translate("FormWindow", "FormWindow"))
        self.lineEdit.setText(_translate("FormWindow", "Page to open"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    FormWindow = QtWidgets.QMainWindow()
    ui = Ui_FormWindow()
    ui.setupUi(FormWindow)
    FormWindow.show()
    sys.exit(app.exec_())

我检查了这个answer，但我不明白如何让它在我的代码中工作。 我还编辑了我的问题，以便成为一个最小的可重复示例，但我的英语并不完美，我担心不能完全理解我在 mre tutotial 上读到的内容，所以很抱歉

Answer 1

我已经有一段时间没有做 QT 的东西了，但可能是因为你又实例化了 QtWidgets.QMainWindow 吗？这是我的第一个猜测。